the mass of earth is 5.9 X 10^24. The mass of pluto is 1.3 X 10^22. compared to pluto, how much greater is earth's mass than pluto's mass.

What is the product? a-3/15a × 5/a-3

Percy rides his bike 11.2 miles in 1.4 hours at a constant rate. write an equation to represent the proportional relationship between the number of hours percy rides, x,and the distance in miles, y, that he travels.

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?